USD315552SExpiredUtility

Trackball for a computer

90
Assignee: CURTIS MFG COMPANY INCPriority: Dec 22, 1989Filed: Dec 22, 1989Granted: Mar 19, 1991
Est. expiryDec 22, 2009(expired)· nominal 20-yr term from priority
Inventors:James E. Sacherman
90
PatentIndex Score
29
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a trackball for a computer, as shown and described.

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